References
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- Hippocrates. A system for on-line interactive retrieval of health information Vol. 1: System description; Vol. 2: Table of data element codes; Vol. 3: Users' Guide. Published by the Greek Ministry of Health and Welfare, Greek, hip release 3. 0, March 1983, in only
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- Control Data Corporation (cdc). Total Athena Retrieval Update Language: User Information Manual. Cdc Publication. 1979, No. 84000090